Imp Questions For All Chapters – General Science Class 8
Short Questions
1. What is classification?
Answer : Classification is grouping living things based on similarities.
2. Who gave the five-kingdom classification?
Answer : Robert Whittaker introduced the five-kingdom classification.
3. Which kingdom includes bacteria?
Answer : The Kingdom Monera includes all types of bacteria.
4. What is the smallest microorganism?
Answer : Viruses are the smallest microorganisms in nature.
5. Which microbe helps in making curd?
Answer : Lactobacillus bacteria help in making curd.
6. Which kingdom do fungi belong to?
Answer : Fungi belong to their own kingdom called Fungi.
7. Which microorganism causes malaria?
Answer : Malaria is caused by a protozoan called Plasmodium.
8. What is the locomotion organ in Amoeba?
Answer : Amoeba moves with the help of pseudopodia.
9. Which kingdom includes unicellular algae?
Answer : Unicellular algae belong to the Kingdom Protista.
10. What is the function of decomposers?
Answer : Decomposers break down dead plants and animals.
11. Which microbe is used to make antibiotics?
Answer : The fungus Penicillium is used to make antibiotics.
12. What is the cell wall of fungi made of?
Answer : The cell wall of fungi is made of chitin.
13. Which microorganism is used in bread making?
Answer : Yeast is used for making bread and other foods.
14. What is the study of viruses called?
Answer : The study of viruses is called virology.
15. What type of cell structure do bacteria have?
Answer : Bacteria have prokaryotic cell structures without nuclei.
16. Which kingdom do green plants belong to?
Answer : Green plants belong to the Kingdom Plantae.
17. Which virus causes polio?
Answer : Poliovirus is responsible for causing polio disease.
18. Which microorganism helps in nitrogen fixation?
Answer : Rhizobium bacteria help in fixing nitrogen in soil.
19. How do fungi get their food?
Answer : Fungi absorb nutrients from dead organic matter.
20. Which bacteria cause food poisoning?
Answer : Salmonella bacteria can cause food poisoning in humans.
Long Questions
1. What is biological classification?
Answer : Biological classification is a system of grouping organisms based on similarities and differences. It helps in identifying, studying, and understanding various living organisms.
2. What are prokaryotic and eukaryotic cells?
Answer : Prokaryotic cells do not have a true nucleus or membrane-bound organelles. Eukaryotic cells have a well-defined nucleus and organelles inside the cytoplasm.
3. What are the characteristics of the Kingdom Monera?
Answer : The Kingdom Monera includes unicellular, prokaryotic organisms like bacteria. These organisms may be autotrophic (make their food) or heterotrophic (depend on others).
4. What are the characteristics of fungi?
Answer : Fungi are non-green, eukaryotic, saprophytic organisms that grow on dead matter. Their cell walls are made of chitin, and they reproduce by spores.
5. How do viruses reproduce?
Answer : Viruses cannot reproduce on their own and need a living host. They enter a host cell, use its machinery to multiply, and destroy the cell.
6. What is the function of decomposers in nature?
Answer : Decomposers break down dead plants and animals into simpler substances. They help recycle nutrients back into the environment, maintaining balance in nature.
7. How are microbes useful in daily life?
Answer : Microbes help in making food like curd, cheese, and bread. They are also used in medicine, such as producing antibiotics like Penicillin.
8. What are autotrophic and heterotrophic organisms?
Answer : Autotrophic organisms make their own food using sunlight, like plants and algae. Heterotrophic organisms depend on others for food, like animals and fungi.
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